BECKLESIA. 181 



long and stiff lateral branches. In the English specimens there 

 are no signs of any articulations or of leaf structures ; so that 

 they cannot well be included in the genus Frenelopsis. The 

 typical form of the genus is well illustrated by Ettingshausen's 

 figures, as also by those of Heer 1 and Saporta. 3 In Fontaine's 

 Potomac flora, 3 several specimens are referred to Schenk's genus, 

 but these have recently been transferred by Nathorst to a new 

 genus, Pseudofrenelopsisf on the ground that the American forms 

 have been incorrectly interpreted by Fontaine. As regards habit, 

 there is some slight resemblance between Becklesia and Camptopteris 

 spiralis, Nath., 5 from Bjuf. On the whole, however, Carruthers' 

 specimens offer the greatest similarity to the following fragments, 

 the nature of which must be left entirely unsettled. 



V. 2361. PI. XIV. Fig. 2. 



In the portion of the specimen represented in the figure the 

 characters of the lateral segments are fairly clearly shown. A small 

 piece of the branch at the right-hand upper corner of the drawing, 

 shows the parallel striation and apparently woody nature of the 

 segments ; a little below, this branch is crossed by another in 

 which the broad median ridge may be seen. Most of the lateral 

 segments are flattened, and do not present such distinct surface 

 features. 



V. 2361c. PL XIV. Fig. 3. 



The flattened main axis fairly distinct, with the irregularly 

 placed lateral branches. The third branch from the top does not 

 appear to arise laterally, but rather from the exposed face of the 

 broader axis. 



V. 2361J. Smaller fragment. Ecclesbourne. Rufford Coll. 



1 Heer (A. 6), Secc. Trab. Geol. Portugal, p. 21, pi. xii. figs. 3-7. (The 

 specimens figured by Heer in bis Flor. foss. Arct., and referred to Frenelopsis, 

 are probably not true examples of tbis genus.) 



2 Saporta (1), pp. 113 and 139, pi. xxi. figs. 9-11, and pi. xxvi. fig. 16. 



3 Fontaine (A. 2), p. 213, pis. xcv.-xcix., cxi., cxii., and clxviii. 



4 Nathorst (5). 



5 Ibid. (A. 1), p. 33, pi. iii. 



